You can eat it by heating. Eating pitaya by heating can avoid gastrointestinal discomfort caused by cold, but it is not advisable to boil it in water or roast it with fire, which will destroy the nutrition of pitaya. The best way is to soak it in warm water, for example, add some water to a pot, turn on a small fire to control the water temperature at about 30 degrees Celsius, and soak it in it, which can not only heat it well, but also will not destroy its nutrition.